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3 Sheets-Sheet l. G. MoNEAL.

BORING MACHINE.

Patented Mar. 15, 1887.

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(No Model.) 3 Sheets-Sheet 2. O. McNEAL.

BORING MAGHINE. No. 359,270. Patented Mar. 15, 1887..

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G. McNEAL.

BORING MACHINE.

No. 359,270. Patented Mar. 15, 1887.

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CHARLES MONEAL, OF MISHAIVAKA, INDIANA, ASSIGNOR TO THE DODGEMANUFACTURING COMPANY, OF SAME PLACE.

BORING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 359,270, dated March15, 1887.

Application filed October 11, 1880. Serial No. 215,974. (No model.)

To all whom it may concern.-

Be it known that I, CHARLES MoNEAL, of Mishawaka, in the county of St.Joseph and State of Indiana, have invented a new and useful Improvementin Boring-Machines and I do hereby declare that the following is a fulland accurate description of the same.

7 The object and capacity of my invention will be illustrated and fullyunderstood from a description of the machine, which I have constructedand used for the special work of boring the bolt-holes in the arms ofwooden pulleys, though I wish it to be understood that I do not limitmyself to either the details of construction shown nor the particularduty described, because it will be apparent that the principles ofoperations are applicable to other kinds of work where duplicatearrangement of uniformly-spaced holes is required.

In the accompanying drawings, Figure l is a perspective view of mymachine. Fig. 2 is a side elevation of the same. Fig. 3 is a frontelevation of the same. Fig. 4 is a perspective view of the spacingrack-plate. Fig.5 is aper- 2 spective view of the angular tabledetached. Fig. 6 is a perspective view of a pulley-arm finished. Fig. 7is a perspective View of my adjustable shoulder-stops, showing amodified form of the table. Fig. 8 is a plan view of the same. Fig. 9 isa perspective view of pulleyarms as prepared for boring. Fig. 10 is aper spective View of table and bracket-plate for use with a wooden post.Fig.11 is a front elevation of a part of the table, showing the ad- 3 5justable stop tolil'nit lateral movement. Figs. 12 and 13 representmodifications of the lateral stop device shown in Figs. 3 and 11. Fig.14is an elevation of the latch-stop in two positions. Fig. 15 is anelevationof a modification of the same, partly in section. Fig. 16 is anelevation, partly in section, showing the manner of boring obliqueholes. Figs. 5 and 16 show a modification wherein the table has a hingedpart, which may be raised obliquely to the 4 plane of said table.

A is the post and frame of the upright boring-machine,similar to suchmachines as ordinarily constructed. B is the driving-pulley, providedwith the sliding mandrel 0, having at its lower end a socket to receivethe boring-tool D, and at its upper end a collar, E, attached to aforked or stirrup lever,F,whereby said mandrel is depressed or raised,as the case may be, to carry the boring-tool into or out of action. Thelever Fisiconnected with 5 5 and controlled by the treadle G. Theseparts do not differ from common forms of such machines.

The particular duty of the machine shown in the drawings is to bore theholes a a b b c 0 in the pulley-arms H. (Shown in Fig. 6.) In order tomatch similar holes in the other similar arms, it is necessary that theholes shall be ac curately spaced and all exactly alike. Heretofore suchspacing has usually been accolnplished by means of a templet; but it isvery difficult to bore the holes exactly by that means. The arms Hdiffer in size and width, and the number of holes required differs, aswell as their spacing. Therefore the means for securing a 7g uniformspacing must be variable.

The most convenient mode of causing the machine to properly anduniformly space the holes is by means of notched spacing-rack d, withits notches separated by the desired 7 5 spaces and a latch adapted toengageone of said notches; but to meet the various spacings required aconsiderable number of such racks must be provided, and it is convenientto assemble allof them in asingle frame and to make the same movable, sothat any particular rack may be quickly moved to position with referenceto the latch. Therefore I first place upon the table a rack-frame, J,which is capable of movement laterally upon said table, and 8 5 may besuffered to rest or be fixed in any position within its range ofmovement. The frame J is provided with a number of spacing-racks,

(Z (Z, each provided with a series of notches, 6, but each seriesdiffering from the others.

A carriage-frame, K, is mounted on the table I, to move forward andbackward 011 guides f above and at right angles to the rack-frame J. Theframe K is provided with a latch, g, impelled by gravity or by a spring,and 5 adapted to engage in the notches 6, so as to control the movementsof the frame K and limit them to the distances between the notches e inthe particular rack d which may be in line with said latch. By movingthe frame J :00

blanks may be placed upon the carriage K and holes bored therein inposition and spacing all exactly corresponding with the spacing of theparticular rack-bar d which may be used, and that it will only benecessary to provide adjustable stopguides, so that the blanks insuccession may be all placed in the same place and position on thecarriage.

The particular duty in boring the parallel series of holes cry arequires the blank to be shifted endwise to bore the second series withthe same spacing as the first. I therefore, for convenience, mount uponthe carriage K another carriage, L, capable of lengthwise movement onsaid carriage K-that is, transverse to the direction of the guide fsothat when the arm H has been placed on carriage L the arm may be shiftedendwise by movement of the carriage L to bore the first hole of eachseries before the carriage K is shifted on the rack d from first tosecond place.

It is evident the movement of the carriage L is not limited to the twopositions. It may have a similar set of rack-plates or some othersuitable and convenient means of step by-step movement, so that anydesired number of equivalent series of holes may be bored.

For the particular duty which I have required for this machine only twoseries of holes, a a, have been required, and it has only been necessaryto provide a notched stop-plate, h, on the carriage K, and on thecarriage K a stop, 2', adapted to engage said notched plate h, and allowit a longer or shorter range of motion, as desired, to make the series aCl, nearer or farther apart to suit arms of different lengths.

The stop-plate h is provided with a series of steps or shouldersapproaching each other, so that each pair represents a differentintervening distance, so that when said plate is moved up or down on thecarriage L the stop 2' will permit a longer or shorter motion of saidcarriage, as the case may be. The same result will be attained by movingthe stop t'up or down on the carriage K. Fig. 12 represents amodification for the stop-plate, It being a spaced rack-bar and aspring-latch.

Fig. 13 also represents a modification, being a pair of adjustable stopsthe effect of which will be apparent to any mechanic. For eonvenience Iprovide and attach to the carriage L stops S, which are adjustablelaterally and vertically to fit the shoulders or ends of the arms H asmost convenient, so that said arms will all assume the same place andposition on the carriage.

In operation the arm H is placed on the carriage L, and said carriagemoved to one end of its stroke. The boring-bit is then caused to descendand the first hole of one series is bored. The carriage L is then movedto the other end of its stroke and the first hole of the other series isbored. The latch g is then raised and the carriage K is moved one stepuntil said latch engages the next notch in the rack then in use, and thesecond hole in the series is bored, and so on. To make the release ofthe latch g automatic, I couple said latch to a lever, k, which ispivoted on the carriage K. A swinging trip-latch, q, is pivoted to thecarriage L, which, when said carriage moves in one direction, engagessaid lever k and lifts the latch q, and when said latch moves in theother direction said latch passes over said lever. Fig. 15 represents amodification wherein the latch is in the form of a reciprocating boltraised from its notch in the rack by the switch it, attached to thecarriage L, and thereby alternately carried under and over said latch assaid carriage is reciprocated. Many other modifications may besuggested. When the arm H is joined to the pulley-rim, long nails aredriven through it into the rim, and for this purpose the nail-holes c care bored obliquely through the arm H, and to support the arm in therequired position I employ a frame, 1%, adjustable as to inclination.Said frame It is placed on the carriage L and fixed thereon, but subjectto adjustment forward and backward on the guide-strip g". A thin edgebar, S, forms at once a convenient and efficient gage and support. Theshoulder r of the arm H rests on said bar S, and the boringbit, when itdescends, then enters the arm H behind the tenon t and, passingobliquely through the arm, makes its exit in front of the shoulder 1'and in the tenon, as shown in Fig. 16. The spacing of the nail-holes cis effected with the movement of the carriage L, and the rack-bar havingthe desired spacing of notches e.

The frame B may be made a part of carriage L, if desired, as shown inFig. 16, or may be separate, as shown in Fig. 5, and the carriage L maybe constructed of wood or metal, as preferred. In case it is made ofmetal, it will be made of cast metal, in the form of a thin shell, asshown in Figs. 1, 2, and 5.

In Figs. 7 and S I represent the adjustable shoulder-stops S, the samebeing vertically adjustable on posts a, each attached to a part of frameL, which, for this purpose, is made in two parts, adjustable in oppositedirection eoincidently by revolving the right and left hand screws V. Inow couple the two arms H,designed for one pulley,by a clamp or dog, asshown in Fig. 9, and adjust the stops S to the ends of the hub-blocksh", attached to said arms,as shown by dotted linesin Fig. 7, and boreboth arms at one operation. The holes a a being equally spaced bothtransversely and longitudinally, the stop i is adjusted to permit therequired longitudinal movement of the carriage L, so that at the end ofits movement in one direction the arm H will be in position for one holea, and at the end of its movement in the other direction will be inposition for the other hole a in the same longi I tudinal line. Themovement of the carriage L from the first to the second hole will notraise the latch but the return movement will raise said latch from itsnotch 6 before it reaches the termination of said movement, and theattendant at the moment of said disengagement will push the carriage Kbackward, while the carriage L continues to move endwise thereon. Saidlatch will then ride on the rack d and will drop into the nextsucceeding notch, and so on. The transverse spacing of the holes a willvary as the width of the arm varies and with the number of holesdesired. Therefore the rack-frame J is shifted to bring the rack (Z,having the proper spacing, under the latch g.

If it is desired to make in each end of the arm H a series of holes, Z),and in making the holes 0 c the carriage L is not moved endwise at all,but with the carriage K is moved step by step backward, the latch 9 maythen be released by hand.

Having described my invention, I claim as new- 1. The carriage whereouthe blank is supported and moved to position, combined with the latch 9,attached to said carriage, and the movable rack-plate J, provided withtwo or more racks, d, differently spaced, whereby by moving saidrack-frame J either one of said racks may be placed in line with thelatch g, as set forth.

2. The adj ustable' 'raclc frame J provided with racks having notches ein series mounted on the table I, and the carriage K, mounted to move onthe guides f on said table I, provided with the latch 9, adapted toengage either one of said racks, as the case may be, combined with thecarriage L, mounted to move on said carriage K at right angles to thedirection of the guidef.

3. The rack-frame J provided with a series of differentracks, and thecarriage K, mounted to move on guides f, and provided with latch 9,adapted to engage with the notches of said rack, combined with thecarriage R, capable of adjustment as to inclination, to hold the arm Hwhile the nail-holes c are being bored obliquely, as set forth.

4. The rack-frame J, provided with a series of different racks, thecarriage K, mounted to move on the guides f, and provided witha latch,g, mounted at the end of the lever k, combined with the carriage L,mounted to move on the carriage K, as set forth, and provided with atrip-latch adapted to unlock the latch 9 when said carriage L is movedin one direetion,and pass it undisturbed when moved in the oppositedirection.

5. The rack-frame J, provided with a series of diflerent racks, and thecarriage K, mounted to move on guides f, and provided with the latch 9,attached to the lever 1:, pivoted to the carriage K, combined with thecarriage L, provided with the swinging trip q, to release said latchwhen said carriage moves in one direction.

6. The carriage K, adapted to reciprocate on the guides f, and thecarriage L, adapted to move on the carriage K in a direction transverseto the guide f, combined with the adjustable-step stop-plate h and thestop 1', substantially as and for the purpose set forth.

7. In combination,in a boring-machine, the sliding mandrel G, revolvingin vertical bearings and beneath it, the carriage K, mounted to moveforward and backward on the guide f, the carriage L, mounted on saidcarriage K and movable toward the right hand or left on guides thereon,a notched spacing-rack, d, below said carriage K, and a latch, g, toengage therewith, whereby the backward movement of the carriages may bemade step by step, as set forth.

CHARLES MUNEAL.

\Vitnesses:

WVILL W. DODGE, W. H. Donen.

